Hex to C Code Converter

Convert hex files to C code arrays online. Supports Intel HEX and Motorola S-record formats with customizable output options.

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About This Tool

This online tool converts hexadecimal files (Intel HEX or Motorola S-record formats) into C programming code. Simply upload your hex file, configure conversion options like variable name, data type, and array formatting, and instantly generate ready-to-use C code arrays for embedded systems development. The tool handles file parsing, validation, and generates properly formatted C code with comments.

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How to Use

Click the upload area or browse to select a hex file (Intel HEX .hex or Motorola S-record .srec/.s19/.s28/.s37 formats)
Configure conversion options: variable name, data type (uint8_t, uint16_t, etc.), bytes per line, and array name
Click 'Convert to C Code' to process the file
View the generated C code with syntax highlighting
Copy the code to clipboard or download as .c file

Frequently Asked Questions

Find Quick Answers

What hex file formats are supported?

The tool supports Intel HEX (.hex) and Motorola S-record (.srec, .s19, .s28, .s37) formats commonly used in embedded systems programming.

Can I customize the generated C code?

Yes, you can set the variable name, choose data type (uint8_t, uint16_t, uint32_t, or unsigned char/short/long), specify bytes per line, and set the array name before conversion.

Is there a file size limit?

The tool processes files entirely in your browser, so it's limited by your device's memory. For typical embedded hex files (up to several MB), it works perfectly.

Does the tool work offline?

Yes, once loaded, all processing happens client-side in your browser. No data is sent to any server.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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